Removed vim settings to avoid file beeing detected as Java by GitHub.

static/js/libs/pdf/pdf.js

@@ -27,8 +27,6 @@ PDFJS.build = '997096f';
   // Use strict in our context only - users might not want it
   'use strict';
 
-/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");